android 实现摇一摇功能(android摇一摇实现)

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实现“摇一摇”功能，其实很简单，就是检测手机的重力感应，具体实现代码如下：

一、在 AndroidManifest.xml 中添加操作权限

<uses-permission android:name="android.permission.VIBRATE"/>

二、实现代码

[java] view plaincopypackage com.xs.test; import android.app.Activity; import android.hardware.Sensor; import android.hardware.SensorEvent; import android.hardware.SensorEventListener; import android.hardware.SensorManager; import android.os.Bundle; import android.os.Handler; import android.os.Message; import android.os.Vibrator; import android.util.Log; import android.widget.Toast; /** * 安卓晃动手机监听--“摇一摇” * * @author 单红宇 * */ public class TestSensorActivity extends Activity { private SensorManager sensorManager; private Vibrator vibrator; private static final String TAG = "TestSensorActivity"; private static final int SENSOR_SHAKE = ; /** Called when the activity is first created. */ @Override public void onCreate(Bundle savedInstanceState) { super.onCreate(savedInstanceState); setContentView(R.layout.main); sensorManager = (SensorManager) getSystemService(SENSOR_SERVICE); vibrator = (Vibrator) getSystemService(VIBRATOR_SERVICE); } @Override protected void onResume() { super.onResume(); if (sensorManager != null) {// 注册监听器 sensorManager.registerListener(sensorEventListener, sensorManager.getDefaultSensor(Sensor.TYPE_ACCELEROMETER), SensorManager.SENSOR_DELAY_NORMAL); // 第一个参数是Listener，第二个参数是所得传感器类型，第三个参数&#;获取传感器信息的频率 } } @Override protected void onPause() { super.onPause(); if (sensorManager != null) {// 取消监听器 sensorManager.unregisterListener(sensorEventListener); } } /** * 重力感应监听 */ private SensorEventListener sensorEventListener = new SensorEventListener() { @Override public void onSensorChanged(SensorEvent event) { // 传感器信息改变时执行该方法 float[] values = event.values; float x = values[0]; // x轴方向的重力加速度，向右为正 float y = values[1]; // y轴方向的重力加速度，向前为正 float z = values[2]; // z轴方向的重力加速度，向上为正 Log.i(TAG, "x轴方向的重力加速度" &#; x &#; "；y轴方向的重力加速度" &#; y &#; "；z轴方向的重力加速度" &#; z); // 一般在这三个方向的重力加速度达到就达到了摇晃手机的状态。 int medumValue = ;// 三星 i怎么晃都不会超过，没办法，只设置了 if (Math.abs(x) > medumValue || Math.abs(y) > medumValue || Math.abs(z) > medumValue) { vibrator.vibrate(); Message msg = new Message(); msg.what = SENSOR_SHAKE; handler.sendMessage(msg); } } @Override public void onAccuracyChanged(Sensor sensor, int accuracy) { } }; /** * 动作执行 */ Handler handler = new Handler() { @Override public void handleMessage(Message msg) { super.handleMessage(msg); switch (msg.what) { case SENSOR_SHAKE: Toast.makeText(TestSensorActivity.this, "检测到摇晃，执行操作！", Toast.LENGTH_SHORT).show(); Log.i(TAG, "检测到摇晃，执行操作！"); break; } } }; } 这种摇一摇比较普通，没有经过算法的加强，重力加速度就是。算法优化如下package com.example.url;import java.io.IOException;import java.net.URL;import com.hahashijie.imageload.ImageLoader;import android.annotation.SuppressLint;import android.app.Activity;import android.graphics.Bitmap;import android.graphics.BitmapFactory;import android.graphics.drawable.Drawable;import android.hardware.Sensor;import android.hardware.SensorEvent;import android.hardware.SensorEventListener;import android.hardware.SensorManager;import android.os.Bundle;import android.os.Handler;import android.os.Message;import android.os.Vibrator;import android.util.Log;import android.widget.ImageView;@SuppressLint("HandlerLeak")public class MainActivity extends Activity {private ImageView image;private SensorManager sensorManager;private Sensor sensor;private Vibrator vibrator;private static final int UPTATE_INTERVAL_TIME = ;private static final int SPEED_SHRESHOLD = ;//这个&#;调节灵敏度private long lastUpdateTime;private float lastX;private float lastY;private float lastZ;@Overrideprotected void onCreate(Bundle savedInstanceState) {super.onCreate(savedInstanceState);setContentView(R.layout.activity_main);sensorManager = (SensorManager) getSystemService(SENSOR_SERVICE);vibrator = (Vibrator) getSystemService(VIBRATOR_SERVICE);image = (ImageView) findViewById(R.id.image);}@Overrideprotected void onResume() {// TODO Auto-generated method stubsuper.onResume();if (sensorManager != null) { sensor = sensorManager.getDefaultSensor(Sensor.TYPE_ACCELEROMETER); } if (sensor != null) { sensorManager.registerListener(sensorEventListener, sensor,SensorManager.SENSOR_DELAY_GAME);//这里选择感应频率 }}/*** 重力感应监听*/private SensorEventListener sensorEventListener = new SensorEventListener() {@Overridepublic void onSensorChanged(SensorEvent event) {long currentUpdateTime = System.currentTimeMillis();long timeInterval = currentUpdateTime - lastUpdateTime;if (timeInterval < UPTATE_INTERVAL_TIME) {return;}lastUpdateTime = currentUpdateTime;// 传感器信息改变时执行该方法float[] values = event.values;float x = values[0]; // x轴方向的重力加速度，向右为正float y = values[1]; // y轴方向的重力加速度，向前为正float z = values[2]; // z轴方向的重力加速度，向上为正float deltaX = x - lastX;float deltaY = y - lastY;float deltaZ = z - lastZ;lastX = x;lastY = y;lastZ = z;double speed = (Math.sqrt(deltaX * deltaX &#; deltaY * deltaY&#; deltaZ * deltaZ) / timeInterval) * ;if (speed >= SPEED_SHRESHOLD) {vibrator.vibrate();image.setImageResource(R.drawable.running);}}@Overridepublic void onAccuracyChanged(Sensor sensor, int accuracy) {}};}

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